blue Definition

blue
adj bluer, bluest

1. With the colour of a clear cloudless sky; having any of the shades of this colour, which falls between green and violet on the spectrum.

Thesaurus: aquamarine, azure, indigo, sapphire, turquoise, navy, cerulean, cobalt, teal.
2. Sad or depressed. See also blues.

Thesaurus: sad, depressed, down, low, moody, melancholy, despondent, out of sorts, miserable, gloomy, morose; Antonym: cheerful.
3. Said of a film or joke etc: pornographic or indecent.

Thesaurus: bawdy, lewd, risqué, vulgar, coarse, suggestive, provocative, pornographic, off-colour (US), smutty, obscene; Antonym: decent.
4. Politically conservative.
5. With a skin which is pale blue or purple because of the cold or from bruising, etc.

noun

1. The colour of a clear cloudless sky; any blue shade or hue.
2. Blue paint or dye.
3. Blue material or clothes.
4. A person who has been chosen to represent a college or university at sport, especially at Oxford or Cambridge.
(Brit)
5. colloq
A supporter of the Conservative Party.
(Austral & NZ)
6. slang
An argument or fight.
(Austral & NZ)
7. colloq
A mistake; a bloomer.
(Austral & NZ)
8. colloq
A nickname commonly given to a person with red hair, especially a man.
Form: Blue
9. A blue liquid or powder (such as indigo) used in laundering whites.

Form: washing-blue (also)

verb blues, blued, bluing, blueing

1. To make something blue.
2. To treat (laundry, linen, etc) with blue.

Derivative: blueness
noun

Derivative: bluer
adj

Derivative: bluish
adj

Idiom: do something till one is blue in the face

To do it repeatedly but without any effect.

Idiom: out of the blue

Without warning; unexpectedly.

Etymology: 13c as blew: from French bleu.